Demagnetizing system for lithium battery positive electrode material production

Abstract

The utility model discloses a demagnetizing system for lithium battery anode material production, which comprises a raw material bin and a demagnetizing assembly, the demagnetizing assembly comprises at least one primary demagnetizing piece, at least one secondary demagnetizing piece, a high-magnetism material bin and a product buffer bin, the primary demagnetizing piece is connected with the raw material bin and used for primary demagnetizing of materials, and the secondary demagnetizing piece is connected with the product buffer bin and used for secondary demagnetizing of the materials. The first-stage demagnetizing piece is used for demagnetizing materials, the second-stage demagnetizing piece is connected with the first-stage demagnetizing piece and used for secondary demagnetizing of the materials, the high-magnetism material bin is connected with the first-stage demagnetizing piece and the second-stage demagnetizing piece and used for collecting high-magnetism materials, and the product temporary storage bin is connected with the first-stage demagnetizing piece and the second-stage demagnetizing piece and used for collecting positive electrode materials. According to the utility model, the problem that the demagnetizing effect is poor due to insufficient contact and too short contact time between the anode material and the magnetism gathering net caused by high possibility of gathering and caking in the falling process and too high falling speed can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, in particular to a demagnetization system for producing lithium battery positive electrode materials. Background Art

[0002] Usually, an iron remover is used to control the amount of metal elements in the positive electrode material to improve the safety of energy storage and power batteries.

[0003] For example, the Chinese utility model patent with application number: CN201120052747.3 is named: A stirring and screening demagnetizer, which includes a stirring kettle, a demagnetizer is arranged at the lower part of the stirring kettle, and a vibrating screen is arranged below the discharge port at the lower end of the stirring kettle. The device is a stirring and screening demagnetizer that integrates a stirring kettle, a drawer-type demagnetizer and a vibrating screen into one, which reduces the production process. The drawer-type demagnetization device can effectively remove iron and magnetic substances in the material during the production process of stirring and crushing the powder material, thereby improving the quality of the material. The device has a simple structure, low cost, easy maintenance and repair, and convenient cleaning, which improves the overall use efficiency of the screening machine. However, the positive electrode material is prone to aggregation and agglomeration during the falling process and the falling speed is too fast, which makes its contact with the magnetic net insufficient and the contact time too short, resulting in poor demagnetization effect.

[0004] Therefore, there is an urgent need for a demagnetization system for the production of lithium battery positive electrode materials to solve the problem in the prior art that the positive electrode materials are easily aggregated and agglomerated during the falling process and the falling speed is too fast, resulting in insufficient contact and too short contact time with the magnetic collecting net, thus resulting in poor demagnetization effect. Utility Model Content

[0005] In view of this, it is necessary to provide a demagnetization system for the production of lithium battery positive electrode materials to solve the technical problem in the prior art that the positive electrode materials are easily aggregated and agglomerated during the falling process and the falling speed is too fast, resulting in insufficient contact and too short contact time with the magnetic collecting net, thus resulting in poor demagnetization effect.

[0006] In order to achieve the above technical purpose, the technical solution of the utility model provides a demagnetization system for the production of lithium battery positive electrode materials, comprising:

[0007] Raw material warehouse; and

[0008] The demagnetization component includes at least one primary demagnetization component, at least one secondary demagnetization component, a high-magnetic material bin and a product buffer bin, wherein the primary demagnetization component is connected to the raw material bin for the initial demagnetization of the material, the secondary demagnetization component is connected to the primary demagnetization component for the secondary demagnetization of the material, the high-magnetic material bin is connected to both the primary demagnetization component and the secondary demagnetization component for collecting high-magnetic materials, and the product buffer bin is connected to both the primary demagnetization component and the secondary demagnetization component for collecting positive electrode materials.

[0009] Furthermore, the first-level demagnetization component includes a first channel and a first electromagnetic iron remover, the first electromagnetic iron remover has a first feed end, a first discharge end and a second discharge end, the first feed end of the first electromagnetic iron remover is connected to the interior of the raw material bin through the first channel, the first discharge end of the first electromagnetic iron remover is connected to the interior of the secondary demagnetization component, and the second discharge end of the first electromagnetic iron remover is connected to the interior of the high-magnetic material bin.

[0010] Furthermore, the secondary demagnetization component includes a second channel and a second electromagnetic iron remover, the second electromagnetic iron remover has a second feed end, a third discharge end and a fourth discharge end, the second feed end of the second electromagnetic iron remover is connected via the first discharge end of the first electromagnetic iron remover, the third discharge end of the second electromagnetic iron remover is connected to the interior of the product buffer bin, and the second discharge end of the first electromagnetic iron remover is connected to the interior of the high-magnetic material bin.

[0011] Furthermore, the number of the first-level demagnetization parts in the demagnetization component is three, the three first electromagnetic iron removers are arranged in parallel, and the second electromagnetic iron removers are arranged one-to-one with the first electromagnetic iron removers, and the demagnetization component also includes a screw feeder and three discharge valves, the feed end of the screw feeder is connected to the discharge end of the raw material bin, the discharge end of the screw feeder is connected to the three first channels, and the discharge valves are arranged one-to-one with the first channels and connected to the first channels.

[0012] Furthermore, the demagnetization system for the production of lithium battery positive electrode materials also includes a sensor assembly, which includes a first weighing sensor and a second weighing sensor. The first weighing sensor is connected to the high magnetic material bin to measure the weight of the material in the high magnetic material bin, and the second weighing sensor is connected to the product cache bin to measure the weight of the material in the product cache bin.

[0013] Furthermore, the demagnetization system for producing lithium battery positive electrode materials also includes a conveying component, the feed end of the conveying component is connected to the discharge end of the high magnetic material bin, and the discharge end of the conveying component is connected to the interior of the raw material bin.

[0014] Furthermore, the conveying assembly includes a negative pressure conveying member, a loading buffer bin and a third electromagnetic iron remover. The feed end of the negative pressure conveying member is connected to the discharge end of the high-magnetic material bin, the feed end of the loading buffer bin is connected to the discharge end of the negative pressure conveying member, the feed end of the third electromagnetic iron remover is connected to the discharge end of the loading buffer bin, and the discharge end of the third electromagnetic iron remover is connected to the feed end of the raw material bin.

[0015] Furthermore, the negative pressure conveying component includes a negative pressure conveying pipe, a negative pressure fan and a bag dust collector. The two ends of the negative pressure conveying pipe are respectively connected to the discharge end of the high-magnetic material bin and the feed end of the loading buffer bin. The negative pressure fan and bag dust collector are arranged in sequence and connected to the negative pressure conveying pipe.

[0016] Furthermore, the conveying component also includes a third weighing sensor, which is connected to the loading buffer bin and is used to measure the weight of the material in the loading buffer bin.

[0017] Furthermore, the conveying component also includes a first rotary valve and a second rotary valve, the first rotary valve is arranged at the discharge end of the high-magnetic material bin, and the second rotary valve is arranged at the discharge end of the loading buffer bin.

[0018] Compared with the prior art, the beneficial effects of the utility model include: a primary demagnetization component and a secondary demagnetization component are sequentially arranged between the raw material warehouse and the product buffer warehouse, and the product after the demagnetization treatment by the primary demagnetization component is demagnetized for a second time, and the high magnetic product obtained after the demagnetization treatment by the primary demagnetization component and the high magnetic product obtained after the demagnetization treatment by the secondary demagnetization component are respectively transported to the high magnetic material warehouse for temporary storage, and the positive electrode material product obtained after the demagnetization treatment by the secondary demagnetization component is transported to the product buffer warehouse for temporary storage. Compared with the prior art, by sequentially arranging a primary demagnetization component and a secondary demagnetization component, the positive electrode material can be demagnetized for a second time, and the product after the demagnetization treatment by the primary demagnetization component can be demagnetized for a second time, which can avoid the problem of insufficient contact between the positive electrode material and the demagnetizer and too short contact time, and effectively improve the demagnetization effect of the positive electrode material. It can solve the technical problem in the prior art that the positive electrode material is easy to aggregate and agglomerate during the falling process and the falling speed is too fast, so that the contact between it and the magnetic net is insufficient and the contact time is too short, resulting in poor demagnetization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a system schematic diagram of a demagnetization system for producing positive electrode materials for lithium batteries provided by an embodiment of the utility model.

[0020] Description of reference numerals:

[0021] Raw material warehouse 1;

[0022] Demagnetization component 2;

[0023] A primary demagnetizing component 21;

[0024] First channel 211;

[0025] A first electromagnetic iron remover 212;

[0026] Secondary demagnetizing element 22;

[0027] Second channel 221;

[0028] Second electromagnetic iron remover 222

[0029] High magnetic material bin 23;

[0030] Product buffer 24;

[0031] Spiral feeder 25;

[0032] Feeding valve 26;

[0033] Sensor assembly 3;

[0034] A first weighing sensor 31;

[0035] and a second load cell 32;

[0036] Conveying component 4;

[0037] Negative pressure conveying member 41;

[0038] Negative pressure delivery pipeline 411;

[0039] Negative pressure fan 412;

[0040] Bag filter 413;

[0041] Loading buffer bin 42;

[0042] A third electromagnetic iron remover 43;

[0043] A third weighing sensor 44;

[0044] A first rotary valve 45;

[0045] The second rotary valve 46 . DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0047] See also Figure 1The utility model provides a demagnetization system for producing positive electrode materials for lithium batteries, including a raw material bin 1 and a demagnetization component 2, the demagnetization component 2 includes at least one primary demagnetization component 21, at least one secondary demagnetization component 22, a high-magnetic material bin 23 and a product buffer bin 24, the primary demagnetization component 21 is connected to the raw material bin 1, and is used for the initial demagnetization of the material, the secondary demagnetization component 22 is connected to the primary demagnetization component 21, and is used for the secondary demagnetization of the material, the high-magnetic material bin 23 is connected to both the primary demagnetization component 21 and the secondary demagnetization component 22, and is used for collecting high-magnetic materials, and the product buffer bin 24 is connected to both the primary demagnetization component 21 and the secondary demagnetization component 22, and is used for collecting positive electrode materials.

[0048] In the present device, a primary demagnetization component 21 and a secondary demagnetization component 22 are sequentially arranged between the raw material bin 1 and the product buffer bin 24. The product after demagnetization treatment by the primary demagnetization component 21 is demagnetized for a secondary time, and the high magnetic product obtained after demagnetization treatment by the primary demagnetization component 21 and the high magnetic product obtained after demagnetization treatment by the secondary demagnetization component 22 are respectively transported to the high magnetic material bin 23 for temporary storage, and the positive electrode material product obtained after demagnetization treatment by the secondary demagnetization component 22 is transported to the product buffer bin 24 for temporary storage.

[0049] Compared with the prior art, by sequentially providing the primary demagnetization component 21 and the secondary demagnetization component 22, the positive electrode material can be subjected to secondary demagnetization treatment, and the product after the demagnetization treatment by the primary demagnetization component 21 can be subjected to secondary demagnetization, which can avoid the problem of insufficient contact and too short contact time between the positive electrode material and the demagnetizer, and effectively improve the demagnetization effect of the positive electrode material. It can solve the technical problem in the prior art that the positive electrode material is easy to aggregate and agglomerate during the falling process and the falling speed is too fast, resulting in insufficient contact and too short contact time with the magnetic net, resulting in poor demagnetization effect.

[0050] Furthermore, the raw material bin 1, high magnetic material bin 23 and product buffer bin 24 in the present device are all common and easily purchased material storage bins on the market. The interior of the material storage bin is hollow and has a feed port and a discharge port. This is a conventional setting known to technicians in this field and will not be elaborated here.

[0051] Specifically, a weighing sensor is also provided on the raw material bin 1 to facilitate the automated production of the system, which will not be elaborated here.

[0052] like Figure 1 As shown, the primary demagnetization component 21 includes a first channel 211 and a first electromagnetic iron remover 212. The first electromagnetic iron remover 212 has a first feed end, a first discharge end and a second discharge end. The first feed end of the first electromagnetic iron remover 212 is connected to the interior of the raw material bin 1 through the first channel 211, the first discharge end of the first electromagnetic iron remover 212 is connected to the interior of the secondary demagnetization component 22, and the second discharge end of the first electromagnetic iron remover 212 is connected to the interior of the high magnetic material bin 23.

[0053] After the material enters the first electromagnetic iron remover 212, electromagnetic iron removal of the material can be achieved. The first electromagnetic iron remover 212 discharges the screened iron-containing material through the first discharge end and discharges the positive electrode material through the second discharge end, thereby achieving a screening effect.

[0054] As an embodiment, the secondary demagnetization component 22 includes a second channel 221 and a second electromagnetic iron remover 222. The second electromagnetic iron remover 222 has a second feed end, a third discharge end and a fourth discharge end. The second feed end of the second electromagnetic iron remover 222 is connected to the first discharge end of the first electromagnetic iron remover 212, the third discharge end of the second electromagnetic iron remover 222 is connected to the interior of the product buffer bin 24, and the second discharge end of the first electromagnetic iron remover 212 is connected to the interior of the high magnetic material bin 23.

[0055] After the material enters the second electromagnetic iron remover 222, secondary electromagnetic iron removal of the material can be achieved. The second electromagnetic iron remover 222 discharges the screened iron-containing material through the first discharge end and discharges the positive electrode material through the second discharge end, thereby achieving a screening effect.

[0056] Furthermore, the first electromagnetic iron remover 212 and the second electromagnetic iron remover 222 are conventional arrangements well known to those skilled in the art, and will not be described in detail herein.

[0057] As a preferred implementation method, Figure 1 As shown, the number of primary demagnetizing components 21 in the demagnetizing component 2 is three, the three first electromagnetic iron removers 212 are arranged in parallel, and the second electromagnetic iron removers 222 are arranged one-to-one with the first electromagnetic iron removers 212, the demagnetizing component 2 also includes a screw feeder 25 and three discharge valves 26, the feed end of the screw feeder 25 is connected to the discharge end of the raw material bin 1, the discharge end of the screw feeder 25 is connected to the three first channels 211, the discharge valves 26 are arranged one-to-one with the first channels 211, and are connected to the first channels 211.

[0058] By arranging three first electromagnetic iron removers 212 and three second electromagnetic iron removers 222 in parallel, the production efficiency can be improved.

[0059] Furthermore, the screw feeder 25 transports materials in a specified direction, and can stably and efficiently control the speed and time of the materials entering the first electromagnetic iron remover 212, thereby ensuring the efficiency and effect of the electromagnetic iron removal. Here, the screw feeder 25 and the discharge valve 26 are conventional settings well known to technicians in this field, and will not be described in detail here.

[0060] like Figure 1 As shown, the device also includes a sensor component 3 and a conveying component 4.

[0061] Among them, the sensor assembly 3 includes a first weighing sensor 31 and a second weighing sensor 32. The first weighing sensor 31 is connected to the high magnetic material bin 23 and is used to measure the weight of the material in the high magnetic material bin 23. The second weighing sensor 32 is connected to the product cache bin 24 and is used to measure the weight of the material in the product cache bin 24.

[0062] The first weighing sensor 31 and the second weighing sensor 32 are used to test the weight of the material in the high-magnetic material bin 23 and the weight of the material in the product buffer bin 24 respectively, so as to facilitate production and realize automated production.

[0063] Furthermore, the first weighing sensor 31 and the second weighing sensor 32 are conventional settings well known to those skilled in the art, and will not be described in detail here.

[0064] As an implementation method, Figure 1 As shown, the feed end of the conveying component 4 is connected to the discharge end of the high magnetic material bin 23 , and the discharge end of the conveying component 4 is connected to the interior of the raw material bin 1 .

[0065] The conveying component 4 is provided to recycle the high-magnetic material obtained through the primary and secondary filtration, thereby reducing the waste of materials and reducing the production cost.

[0066] As an implementation method, Figure 1 As shown, the conveying assembly 4 includes a negative pressure conveying member 41, a loading buffer bin 42 and a third electromagnetic iron remover 43. The feed end of the negative pressure conveying member 41 is connected to the discharge end of the high magnetic material bin 23, the feed end of the loading buffer bin 42 is connected to the discharge end of the negative pressure conveying member 41, the feed end of the third electromagnetic iron remover 43 is connected to the discharge end of the loading buffer bin 42, and the discharge end of the third electromagnetic iron remover 43 is connected to the feed end of the raw material bin 1.

[0067] The high-magnetic material in the high-magnetic material bin 23 is transported to the loading buffer bin 42 for temporary storage through the negative pressure conveyor 41, and then demagnetized three times by the third electromagnetic iron remover 43, so as to maximize the recovery and utilization of true and false materials in the high-magnetic material and reduce production costs.

[0068] As a preferred implementation method, Figure 1 As shown, the negative pressure conveying component 41 includes a negative pressure conveying pipe 411, a negative pressure fan 412 and a bag dust collector 413. The two ends of the negative pressure conveying pipe 411 are respectively connected to the discharge end of the high magnetic material bin 23 and the feed end of the loading buffer bin 42. The negative pressure fan 412 and the bag dust collector 413 are arranged in sequence and connected to the negative pressure conveying pipe 411.

[0069] The negative pressure conveying pipeline 411 is used to guide and seal the environment. The negative pressure force generated by the negative pressure fan 412 transports the material in the high magnetic material bin 23 to the loading buffer bin 42, and then the dust and impurity removal are carried out by the bag dust collector 413.

[0070] Furthermore, the negative pressure fan 412 here is a Roots blower that is easily purchased on the market, and the negative pressure delivery pipeline 411, the Roots blower and the bag dust collector 413 here are conventional settings well known to those skilled in the art, and will not be described in detail here.

[0071] As another implementation method, Figure 1 As shown, the conveying component 4 also includes a third weighing sensor 44 , which is connected to the loading buffer bin 42 and is used to measure the weight of the material in the loading buffer bin 42 .

[0072] The third sensor is used to test the weight of the material in the loading buffer bin 42 to facilitate production and realize automated production. The third sensor here is a conventional setting known to those skilled in the art and will not be described in detail here.

[0073] As another implementation method, Figure 1 As shown, the conveying assembly 4 also includes a first rotary valve 45 and a second rotary valve 46 . The first rotary valve 45 is arranged at the discharge end of the high magnetic material bin 23 , and the second rotary valve 46 is arranged at the discharge end of the loading buffer bin 42 .

[0074] By setting the first rotary valve 45 and the second rotary valve 46, the discharge of the material can be effectively controlled, which is convenient for automated production. The rotary valve here is a conventional setting well known to those skilled in the art and will not be described in detail here.

[0075] In the specific working process of the utility model, a primary demagnetization component 21 and a secondary demagnetization component 22 are sequentially arranged between the raw material warehouse 1 and the product buffer warehouse 24, and the product after the demagnetization treatment by the primary demagnetization component 21 is subjected to secondary demagnetization, and the high magnetic product obtained after the demagnetization treatment by the primary demagnetization component 21 and the high magnetic product obtained after the demagnetization treatment by the secondary demagnetization component 22 are respectively transported to the high magnetic material warehouse 23 for temporary storage, and the positive electrode material product obtained after the demagnetization treatment by the secondary demagnetization component 22 is transported to the product buffer warehouse 24 for temporary storage. Compared with the prior art, by sequentially arranging the primary demagnetization component 21 and the secondary demagnetization component 22, the positive electrode material can be subjected to secondary demagnetization treatment, and the product after the demagnetization treatment by the primary demagnetization component 21 can be subjected to secondary demagnetization, which can avoid the problem of insufficient contact between the positive electrode material and the demagnetizer and too short contact time, and effectively improve the demagnetization effect of the positive electrode material.

[0076] When in use, the iron phosphate material to be removed from the iron is first sent to the raw material warehouse 1. At this time, the number of metal particles in the iron phosphate material is 236 pcs / kg. The material is evenly transported to the three first electromagnetic iron removers 212 through the screw feeder 25. Then, after the first electromagnetic iron remover 212 is demagnetized once, the iron phosphate material to be removed from the iron continues to enter the second electromagnetic iron remover 222, and the high-magnetic material enters the first electromagnetic iron remover 212. Among them, the background magnetic field in the first electromagnetic iron remover 212 and the second electromagnetic iron remover 222 is 2800guass, and the number of metal particles in the iron phosphate material after the first demagnetization is 101 pcs / kg. After the second demagnetization, the iron phosphate material The number of metal particles in the iron material is 35 pcs / kg, and then after secondary electromagnetic iron removal, the material enters the product buffer bin 24. The proportion of high magnetic material produced after passing through the two-stage electromagnetic iron remover is 5‰ of the iron phosphate material entering the raw material bin 1, and the number of metal particles of the high magnetic material is 1478 pcs / kg. Finally, the material enters the feeding buffer bin 42 through the negative pressure conveying pipe 411, the negative pressure fan 412 and the bag dust collector 413, and automatically enters the third electromagnetic iron remover 43 under the control of the third weighing sensor 44 and the second rotary valve 46. The magnetic field strength of the magnetic rod in the third electromagnetic iron remover 43 is 6000guass, thereby achieving the purpose of recycling high magnetic materials.

[0077] Furthermore, the highly magnetic material produced by the third electromagnetic iron remover 43 is waste material with a very high content of metal particles, and the concentration of metal particles reaches 3521 pcs / kg. The iron phosphate material after iron removal by the third electromagnetic iron remover 43 enters the raw material bin 1, and is mixed with the iron phosphate material to be processed again for secondary demagnetization.

[0078] Through the above system, the device can solve the technical problem in the prior art that the positive electrode material is easy to aggregate and clump during the falling process and the falling speed is too fast, resulting in insufficient contact and too short contact time with the magnetic collecting net, thus resulting in poor demagnetization effect.

[0079] The above is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A demagnetization system for producing positive electrode materials for lithium batteries, characterized in that: include: Raw material warehouse; as well as The demagnetization component includes at least one primary demagnetization component, at least one secondary demagnetization component, a high-magnetic material bin and a product buffer bin, wherein the primary demagnetization component is connected to the raw material bin for the initial demagnetization of the material, the secondary demagnetization component is connected to the primary demagnetization component for the secondary demagnetization of the material, the high-magnetic material bin is connected to both the primary demagnetization component and the secondary demagnetization component for collecting high-magnetic materials, and the product buffer bin is connected to both the primary demagnetization component and the secondary demagnetization component for collecting positive electrode materials.

2. The demagnetization system for producing positive electrode materials for lithium batteries according to claim 1, characterized in that: The first-level demagnetization component includes a first channel and a first electromagnetic iron remover, the first electromagnetic iron remover has a first feed end, a first discharge end and a second discharge end, the first feed end of the first electromagnetic iron remover is connected to the interior of the raw material bin through the first channel, the first discharge end of the first electromagnetic iron remover is connected to the interior of the secondary demagnetization component, and the second discharge end of the first electromagnetic iron remover is connected to the interior of the high-magnetic material bin.

3. The demagnetization system for producing positive electrode materials for lithium batteries according to claim 2, characterized in that: The secondary demagnetization component includes a second channel and a second electromagnetic iron remover, the second electromagnetic iron remover has a second feed end, a third discharge end and a fourth discharge end, the second feed end of the second electromagnetic iron remover is connected via the first discharge end of the first electromagnetic iron remover, the third discharge end of the second electromagnetic iron remover is connected to the interior of the product buffer bin, and the second discharge end of the first electromagnetic iron remover is connected to the interior of the high-magnetic material bin.

4. The demagnetization system for producing positive electrode materials for lithium batteries according to claim 3, characterized in that: The number of the first-level demagnetization parts in the demagnetization component is three, the three first electromagnetic iron removers are arranged in parallel, and the second electromagnetic iron remover is arranged one-to-one with the first electromagnetic iron remover. The demagnetization component also includes a screw feeder and three discharge valves. The feed end of the screw feeder is connected to the discharge end of the raw material bin, and the discharge end of the screw feeder is connected to the three first channels. The discharge valve is arranged one-to-one with the first channel and connected to the first channel.

5. The demagnetization system for producing positive electrode materials for lithium batteries according to claim 4, characterized in that: It also includes a sensor assembly, which includes a first weighing sensor and a second weighing sensor. The first weighing sensor is connected to the high-magnetic material bin and is used to measure the weight of the material in the high-magnetic material bin. The second weighing sensor is connected to the product cache bin and is used to measure the weight of the material in the product cache bin.

6. The demagnetization system for producing positive electrode materials for lithium batteries according to claim 5, characterized in that: It also includes a conveying component, the feed end of the conveying component is connected to the discharge end of the high-magnetic material bin, and the discharge end of the conveying component is connected to the interior of the raw material bin.

7. The demagnetization system for producing positive electrode materials for lithium batteries according to claim 6, characterized in that: The conveying assembly includes a negative pressure conveying member, a loading buffer bin and a third electromagnetic iron remover. The feed end of the negative pressure conveying member is connected to the discharge end of the high magnetic material bin, the feed end of the loading buffer bin is connected to the discharge end of the negative pressure conveying member, the feed end of the third electromagnetic iron remover is connected to the discharge end of the loading buffer bin, and the discharge end of the third electromagnetic iron remover is connected to the feed end of the raw material bin.

8. The demagnetization system for producing positive electrode materials for lithium batteries according to claim 7, characterized in that: The negative pressure conveying component includes a negative pressure conveying pipeline, a negative pressure fan and a bag dust collector. The two ends of the negative pressure conveying pipeline are respectively connected to the discharge end of the high-magnetic material bin and the feed end of the loading buffer bin. The negative pressure fan and the bag dust collector are arranged in sequence and connected to the negative pressure conveying pipeline.

9. The demagnetization system for producing positive electrode materials for lithium batteries according to claim 8, characterized in that: The conveying component also includes a third weighing sensor, which is connected to the loading buffer bin and is used to measure the weight of the material in the loading buffer bin.

10. The demagnetization system for producing positive electrode materials for lithium batteries according to claim 9, characterized in that: The conveying assembly also includes a first rotary valve and a second rotary valve. The first rotary valve is arranged at the discharge end of the high-magnetic material bin, and the second rotary valve is arranged at the discharge end of the loading buffer bin.

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